Seemings and Justification

You believe that there is a book (or a computer screen) in front of you because it seems visually that way. I believe that I ate cereal for breakfast because I seem to remember eating it for breakfast. And we believe that torturing for fun is morally wrong and that 2+2=4 because those claims seem intuitively obvious. In each of these cases, it is natural to think that our beliefs are not only base...